Regulator for dynamo-electric machines



(No Model.) I

W. M. SOHLESINGBR. REGULATOR FOR DYNAMO ELECTRIC MACHINES.

No. 331,552. Patented Dec. 1 1 885.

INVENTOR ATTORNEY WITNESSES.

UNITED STATES PATENT OFFICEO \VILLIAM M. SOHLESINGER, OF PHILADELPHIA, PENNSYLVANIA.

REGULATOR FOR DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 331,552, dated December 1, 1885.

Application filed September 19, 1885. Serial No. 177,539. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM M. SonLEs- INGER, a subject of the Queen of Great Britain, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Regulators for Dynamo-Electric Machines, of which the following is a specification, reference being had therein to the accompanying drawing, which is a diagrammatic view showing devices embodying my improvements.

My invention has relation to dynamo-electric machines in general, but particularly to those for feeding the line-conductors for an electric railway or other translating devices; and it has forits object to regulate the dynamo to give a certain difference in potential on the brushes of the generator or between two points on its outside circuit, and to prevent the dy namo overheating by reason of it generating too great a current.

My invention accordingly consistsin taking a loop or branch from the main conductors, placing a solenoid or magnet therein the core or armature of which acts upon switching devices, one part of which is also controlled or operated by a solenoid or magnet in circuit with one of the line-conductors, either or both of which act to change the direction of the current to and from a current-regulating device in circuit with the field-magnet coils of the dynamo, whereby the current generated by the dynamo is never permitted to rise above a desired point or limit, all of said parts being constructed, combined, and arranged for operation as hereinafter described and claimed.

In the drawing, A A represent the lineconductors; A the generator or dynamoelectrio machine therefor. a a is a loop from conductors A A, including asolenoid, B, which is of a high resistance, and the core I) of which has a retractingspring, I), provided with an adjusting-screw, I). Tothelower end of core b is attached a non-conducting strip, b which engages with levers c c, pivoted, respectively, at c c" to a standard, 0. These levers are electric conductors insulated from each other by standard 0, and from their pivot-points proceed wires or connections d d, preferably forming a second loop from conductors A A. The free ends of levers c c are adapted to metal strips 6 c e on an insulating-strip, f secured to a core, f, of a solenoid, F, which is of alow resistance. The core f is provided with a retractile spring, f having an adj Listing-screw, f From strips 0 c e lead connections 1 2 3 to a regulating device, G, of any of the well-known automatically-acting forms, in circuit by way of wires 00 :0 with the field-coils of dynamo A". The solenoid F is included in the line of one of the conductors, and its core f, as well as that of solenoid B, are provided with stops h, for limiting their upward movement; and h are additional stops suitably located for limiting the reverse movement of said cores.

The tension of the spring f is adjusted to maintain the core f in position within solenoid F, according to the limit of current desired for the dynamo, and the tension of spring I) is adjusted to maintain core I) in solenoid B according to the diiference of potential desired on the brushes of the generator or between any two points on its outside circuit or lineconductors. If the said difference of potential on the brushes or on the outside circuit of the generator is the desired one, the core I) of the solenoid B holds the levers c 0 out of contact with the metal strips 6 e c, as shown; but should said difference of potential sink or rise said levers will in the first case be moved by the elevation of core b in solenoid B to contact, respectively, with strips 6 e, and in the second case with strips 6 and a, due to the downward movement of said core, allowing a current in the one case to flow from d c 6 through regulating device G, entering by way of wire 2 at g, and leaving at g, and thence passing by way of wire 8 to e, c, and d to conductor A, and in the other case from d c e and wire 1 to regulator G, entering at g and leaving at g, and thence by wire 2 to c, c, and d to conductor A, thereby causing the regulator to act upon the field of the dynamo to maintain a fixed difference of potential on the brushes or between the points on the outside eircuit of the generator by raising its electro-motive force in the first case and re ducing it in the second case untilsuch limit is reached.

As the quantity of current generated by the dynamo rises above a certain fixed point or limit, above which it tends to injure the dynamo,the coref in solenoid F is pulled down by the current passing through it by reason of ICO such current, making the solenoid strong enough to overcome the tension of springf, so that strip e touches lever c, and strip e touches lever thereby establishing the circuit through (Z c 6 wire 1 g G g e c d, and,

, thus reducing the electro-niotive force of the generator, spring I) will then raise core I) of solenoid B until stop It thereof prevents further rising, while at the same time core f of solenoid F sinks, keeping e c in contact with c and 0, respectively, until the current reaches the limit.

If the current remains at or sinks below the limit, core f will be pulled up by spring f until stop It thereof stops such upward movement, allowing the solenoid B to act to again regulate the clectro-motive force, as above described. The dynamo will therefore never give a current which is too large for it or one which might heat it too much.

Instead of using the solenoids B Emagnets with arniatures may be substituted therefor.

WVhen both solenoids are used, as above described, they successively or coincidently act, as above described, to fix the limit both of the electro-motive force of the dynamo and the amount of current generated.

line-circuit having an clcctro-magnet with armature,a circuit-changing switch in engagement with said armature, asecond loop from the line-circuit leading to said switch, an electromagnetincluded in one of the conductors ofthe linecircuit, and provided with an armature having insulated blocks forming part of said reversing-switch, and a regulator in circuit with the field-magnets of the generator and with said insulated blocks,substautiall y as and for the purpose set forth.

2. The combination, with a dynamo-electric machine or generator and its line-circuit, of a loop from the line-circuit having an electromagnet with armature, a circuit changing switch in engagement with said armature, a second loop from the line-circuit leading to said switch, and a regulator in circuit with the field-magnets of the dynamo, and with said switch, substantially as and for the purpose set forth.

3. The combinatiou,with a dynamo-electric machine and its outside circuit, of a loop from said circuit having a high-resistance magnet with armature, a circuit-changing switch in engagement with said armature, a low-resistance magnet having an armature and located in the circuit of one of the conductors of said outside circuit, insulated blocks on said armature forming part of said switch, and a regulator in circuit with the field-magnets of the dynamo and with said insulated blocks, substautially as and for the purpose set forth.

In testimony whereof I a'llix my signature in presence of two witnesses.

\VILLIAM M. SOHLESINGER.

WVitnesses:

S. J. VAN STAVOREN, CHAS. F. VAN HORN. 

